A4 Quattro Cabriolet L4-2.0L Turbo (BWT) (2009)
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Leak Detection Pump: Testing and Inspection
Leak Detection Pump, Checking
Leak Detection Pump, Checking
Special tools, testers and auxiliary items required
‹› Multimeter.
‹› Wiring diagram.
Test requirements
‹› Fuse (S345) OK.
‹› The Engine Component Power Supply Relay (J757) OK.
‹› The ignition switched off.
‹› Voltage for the Leak Detection Pump (LDP) (V144) is supplied by the Engine Component Power Supply Relay (J757).
Test procedure
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Perform a preliminary check to verify the customers complaint. Refer to => [ General Diagnosis ] See: Computers and Control Systems/Testing
and Inspection/Initial Inspection and Diagnostic Overview/General Diagnosis.
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Remove the left rear wheel housing liner. Refer to Body Exterior Repair Information.
Start diagnosis
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Disconnect the Leak Detection Pump (LDP) (V144 ) electrical harness connector - 3 -.
Checking internal resistance
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Using a Multimeter, check the Leak Detection Pump (LDP) (V144) for resistance as follows:
